Initial import

1 files changed, 248 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mr.c b/drivers/net/ethernet/mellanox/mlx5/core/mr.c
new file mode 100644
index 000000000..1adb300dd
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mr.c
@@ -0,0 +1,248 @@
+/*
+ * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mlx5/driver.h>
+#include <linux/mlx5/cmd.h>
+#include "mlx5_core.h"
+
+void mlx5_init_mr_table(struct mlx5_core_dev *dev)
+{
+	struct mlx5_mr_table *table = &dev->priv.mr_table;
+
+	rwlock_init(&table->lock);
+	INIT_RADIX_TREE(&table->tree, GFP_ATOMIC);
+}
+
+void mlx5_cleanup_mr_table(struct mlx5_core_dev *dev)
+{
+}
+
+int mlx5_core_create_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
+			  struct mlx5_create_mkey_mbox_in *in, int inlen,
+			  mlx5_cmd_cbk_t callback, void *context,
+			  struct mlx5_create_mkey_mbox_out *out)
+{
+	struct mlx5_mr_table *table = &dev->priv.mr_table;
+	struct mlx5_create_mkey_mbox_out lout;
+	int err;
+	u8 key;
+
+	memset(&lout, 0, sizeof(lout));
+	spin_lock_irq(&dev->priv.mkey_lock);
+	key = dev->priv.mkey_key++;
+	spin_unlock_irq(&dev->priv.mkey_lock);
+	in->seg.qpn_mkey7_0 |= cpu_to_be32(key);
+	in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_MKEY);
+	if (callback) {
+		err = mlx5_cmd_exec_cb(dev, in, inlen, out, sizeof(*out),
+				       callback, context);
+		return err;
+	} else {
+		err = mlx5_cmd_exec(dev, in, inlen, &lout, sizeof(lout));
+	}
+
+	if (err) {
+		mlx5_core_dbg(dev, "cmd exec failed %d\n", err);
+		return err;
+	}
+
+	if (lout.hdr.status) {
+		mlx5_core_dbg(dev, "status %d\n", lout.hdr.status);
+		return mlx5_cmd_status_to_err(&lout.hdr);
+	}
+
+	mr->iova = be64_to_cpu(in->seg.start_addr);
+	mr->size = be64_to_cpu(in->seg.len);
+	mr->key = mlx5_idx_to_mkey(be32_to_cpu(lout.mkey) & 0xffffff) | key;
+	mr->pd = be32_to_cpu(in->seg.flags_pd) & 0xffffff;
+
+	mlx5_core_dbg(dev, "out 0x%x, key 0x%x, mkey 0x%x\n",
+		      be32_to_cpu(lout.mkey), key, mr->key);
+
+	/* connect to MR tree */
+	write_lock_irq(&table->lock);
+	err = radix_tree_insert(&table->tree, mlx5_base_mkey(mr->key), mr);
+	write_unlock_irq(&table->lock);
+	if (err) {
+		mlx5_core_warn(dev, "failed radix tree insert of mr 0x%x, %d\n",
+			       mlx5_base_mkey(mr->key), err);
+		mlx5_core_destroy_mkey(dev, mr);
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(mlx5_core_create_mkey);
+
+int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr)
+{
+	struct mlx5_mr_table *table = &dev->priv.mr_table;
+	struct mlx5_destroy_mkey_mbox_in in;
+	struct mlx5_destroy_mkey_mbox_out out;
+	struct mlx5_core_mr *deleted_mr;
+	unsigned long flags;
+	int err;
+
+	memset(&in, 0, sizeof(in));
+	memset(&out, 0, sizeof(out));
+
+	write_lock_irqsave(&table->lock, flags);
+	deleted_mr = radix_tree_delete(&table->tree, mlx5_base_mkey(mr->key));
+	write_unlock_irqrestore(&table->lock, flags);
+	if (!deleted_mr) {
+		mlx5_core_warn(dev, "failed radix tree delete of mr 0x%x\n",
+			       mlx5_base_mkey(mr->key));
+		return -ENOENT;
+	}
+
+	in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_MKEY);
+	in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mr->key));
+	err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
+	if (err)
+		return err;
+
+	if (out.hdr.status)
+		return mlx5_cmd_status_to_err(&out.hdr);
+
+	return err;
+}
+EXPORT_SYMBOL(mlx5_core_destroy_mkey);
+
+int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
+			 struct mlx5_query_mkey_mbox_out *out, int outlen)
+{
+	struct mlx5_query_mkey_mbox_in in;
+	int err;
+
+	memset(&in, 0, sizeof(in));
+	memset(out, 0, outlen);
+
+	in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_MKEY);
+	in.mkey = cpu_to_be32(mlx5_mkey_to_idx(mr->key));
+	err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen);
+	if (err)
+		return err;
+
+	if (out->hdr.status)
+		return mlx5_cmd_status_to_err(&out->hdr);
+
+	return err;
+}
+EXPORT_SYMBOL(mlx5_core_query_mkey);
+
+int mlx5_core_dump_fill_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mr *mr,
+			     u32 *mkey)
+{
+	struct mlx5_query_special_ctxs_mbox_in in;
+	struct mlx5_query_special_ctxs_mbox_out out;
+	int err;
+
+	memset(&in, 0, sizeof(in));
+	memset(&out, 0, sizeof(out));
+
+	in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
+	err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
+	if (err)
+		return err;
+
+	if (out.hdr.status)
+		return mlx5_cmd_status_to_err(&out.hdr);
+
+	*mkey = be32_to_cpu(out.dump_fill_mkey);
+
+	return err;
+}
+EXPORT_SYMBOL(mlx5_core_dump_fill_mkey);
+
+int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
+			 int npsvs, u32 *sig_index)
+{
+	struct mlx5_allocate_psv_in in;
+	struct mlx5_allocate_psv_out out;
+	int i, err;
+
+	if (npsvs > MLX5_MAX_PSVS)
+		return -EINVAL;
+
+	memset(&in, 0, sizeof(in));
+	memset(&out, 0, sizeof(out));
+
+	in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_PSV);
+	in.npsv_pd = cpu_to_be32((npsvs << 28) | pdn);
+	err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
+	if (err) {
+		mlx5_core_err(dev, "cmd exec failed %d\n", err);
+		return err;
+	}
+
+	if (out.hdr.status) {
+		mlx5_core_err(dev, "create_psv bad status %d\n",
+			      out.hdr.status);
+		return mlx5_cmd_status_to_err(&out.hdr);
+	}
+
+	for (i = 0; i < npsvs; i++)
+		sig_index[i] = be32_to_cpu(out.psv_idx[i]) & 0xffffff;
+
+	return err;
+}
+EXPORT_SYMBOL(mlx5_core_create_psv);
+
+int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
+{
+	struct mlx5_destroy_psv_in in;
+	struct mlx5_destroy_psv_out out;
+	int err;
+
+	memset(&in, 0, sizeof(in));
+	memset(&out, 0, sizeof(out));
+
+	in.psv_number = cpu_to_be32(psv_num);
+	in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_PSV);
+	err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
+	if (err) {
+		mlx5_core_err(dev, "destroy_psv cmd exec failed %d\n", err);
+		goto out;
+	}
+
+	if (out.hdr.status) {
+		mlx5_core_err(dev, "destroy_psv bad status %d\n",
+			      out.hdr.status);
+		err = mlx5_cmd_status_to_err(&out.hdr);
+		goto out;
+	}
+
+out:
+	return err;
+}
+EXPORT_SYMBOL(mlx5_core_destroy_psv);